Stockholders' Equity and Compensation Arrangements Share - Based Compensation Activity (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Note [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

The table below summarizes the stock option activity for the six months ended June 30, 2016:

	Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands) (1)
Outstanding at December 31, 2015	1,584,832		$	0.95	3.96	$	3,360
Exercised	(356,211	)	1.22
Forfeited	(65,951	)	0.82
Outstanding and exercisable at June 30, 2016	1,162,670		$	0.85	3.38	$	2,790

(1) The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of the Company's stock on the last day of each period and the exercise price, multiplied by the number of options where the fair value exceeds the exercise price) that would have been received by the option holders had all option holders exercised their options as of June 30, 2016 and December 31, 2015, respectively.

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

The table below summarizes activity regarding unvested restricted stock units granted under the Plans for the six months ended June 30, 2016:

	Restricted Stock Units		Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2015	39,143,509		$	6.53
Granted	14,962,149		$	3.73
Vested	(13,299,333	)	$	6.16
Forfeited	(7,950,954	)	$	6.64
Unvested at June 30, 2016	32,855,371		$	5.40

Schedule of Nonvested Restricted Stock Units Activity

The table below summarizes activity regarding unvested restricted stock for the six months ended June 30, 2016:

	Restricted Stock Awards		Weighted- Average Grant Date Fair Value (per share)
Unvested at December 31, 2015	1,908,408		$	5.72
Granted	—		$	—
Vested	(492,422	)	$	7.42
Forfeited	(196,968	)	$	7.42
Unvested at June 30, 2016	1,219,018		$	4.76